Time tested: Three months
What’s good? GT85 has so far proved itself to be immensely useful. It’s incredibly good at cleaning chains, and even better at removing stubborn wheel grime which every other cleaner struggles with. I hardly have to scrub the wheels after they’ve been squirted with a bit of GT85. It’s also supposed to be really good for removing post-wash water and soap from difficult-to-reach places, though I haven’t tried this yet. The spray was on offer in Aldi recently for only £2.99, so I stocked up on a couple of cans.
What’s not? Very little. I go through a can pretty quickly, but that could just be me using too much in my enthusiasm.